Sign inSubmit
Tips: “quotes” for a phrase · author:Lee · a DOI goes straight to its article

385 articles for “Dynamics”
Set a search alert
Research ArticleOpen accessIn the abstractAnalysis of Heat Transport in a Proton Exchange Membrane (PEM) Fuel CellE. Afshari, S.A. JazayeriIn this study a two-phases, single-domain and non-isothermal model of a Proton Exchange Membrane (PEM) fuel cell has been studied to investigate thermal management effects on fuel cell performance. A set of governing equations, conservation of mass, momentum, species, energy and charge for gas diffusion layers, catalyst layers and the membrane regions are considered. These equations are solved numerically in … …American Journal of Applied Sciences, Vol. 6, Issue 1 · 31 Jan 2009 · 7,343 accessesView PDFCite
Research ArticleOpen accessIn the abstractComparisons of Phytotoxicity of Barley Parts Extracts in Three Growth Stages on Annual RyegrassKolahi Maryam, Kolahi MinaProblem statement: The importance of allelopathy in nature and in agroecosystem has attracted researcher's attention with the main goal of using the phenomenon in biological control of weeds. currently, active involvement of scientists from different disciplines made allelopathy a multidisciplinary subject, and transformed the research from basic to applied, enabling use of allelopathy in agriculture and forestry. Screening accessions of … …American Journal of Agricultural and Biological Sciences, Vol. 3, Issue 4 · 31 Dec 2008 · 7,602 accessesView PDFCite
Research ArticleOpen accessIn the abstractCharacterization of Frequency Mode inside an Open Cavity for Different Shape RatioHallek Khouloud, Mourad Bouterra, Afif El Cafsi et al.A number of studies have referred to the existence of a vortex cell within an urban street canyon. The understanding of vortex dynamics or vorticity distribution is a such configuration is of great interest. This configuration was simulated by the interaction between a boundary layer and a cavity. Experimental characterization of the vortex structures evolution was developed by the technique … …American Journal of Applied Sciences, Vol. 5, Issue 11 · 30 Nov 2008 · 6,846 accessesView PDFCite
Research ArticleOpen accessIn the abstractFlow Simulation in Engine Cylinder with Spring MeshM.H. Shojaeefard, A.R. NoorpoorThis investigation presents results from numerical simulation of the air flow in Spark Ignition Engine (SI engine) cylinder. Accurate modeling of the flow in cylinder is a key part of successful combustion simulation. The most usual numerical method in Computational Fluid Dynamics (CFD) is finite volume. In this investigation an important, common fluid flow patterns in CFD simulations, namely, Tumble … …American Journal of Applied Sciences, Vol. 5, Issue 10 · 31 Oct 2008 · 7,065 accessesView PDFCite
Research ArticleOpen accessIn the abstractInput-Output Feedback Linearization Cascade Controller Using Genetic Algorithm for Rotary Inverted Pendulum SystemIraj Hassanzadeh, Saleh Mobayen, Abbas HarifiThe Rotary Inverted Pendulum (RIP) system is a significant classical problem of control engineering which has been investigated in the past decades. This study presents an optimum Input- Output Feedback Linearization (IOFL) cascade controller utilized Genetic Algorithm (GA). Due to the non-minimum phase behavior of the system, IOFL controller leads to unstable internal dynamics. Therefore a cascade structure is proposed … …American Journal of Applied Sciences, Vol. 5, Issue 10 · 31 Oct 2008 · 7,414 accessesView PDFCite
Research ArticleOpen accessIn the abstractNumerical Study of the Temperature Separation in the Ranque-Hilsch Vortex TubeSaeid Akhesmeh, Nader Pourmahmoud, Hasan SedgiThis research has been carried out in order to provide an understanding of the physical behaviors of the flow variation of pressure and temperature in a vortex tube. A computational fluid dynamics model is used to predict the flow fields and the associated temperature separation within a Ranque-Hilsch vortex tube. The CFD model is a steady axisymmetric model (with swirl) … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 3 · 30 Sep 2008 · 7,322 accessesView PDFCite
Research ArticleOpen accessIn the abstractTime-Marching Method for Computations of High-Speed Compressible Flow on Structured and Unstructured GridK.C. Ng, M.Z. Yusoff, K. Munisamy et al.The development of Computational Fluid Dynamics (CFD) compressible codes for 2D structured quadrilateral grid and 3D unstructured hexahedral grid is described. The high-speed flow in a nozzle blade cascade is predicted numerically by solving the 2D/3D Euler Equations in a coupled manner. The new finite volume CFD solvers employ second-order accurate central differencing scheme for spatial discretization and multi-stage Runge-Kutta … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 2 · 30 Jun 2008 · 7,354 accessesView PDFCite
Research ArticleOpen accessIn the abstractComputational Visualization and Simulation of Diesel Engines Valve Lift Performance Using CFDSemin, Rosli Abu Bakar, Abdul Rahim IsmailThe paper visualized and simulated the intake and exhaust valve lift in the single-cylinder four-stroke direct injection diesel engine. The visualization and simulation computational development were using the commercial Computational Fluid Dynamics of STAR-CD 3.15A software and GT-SUITE 6.2 software. The one dimensional of valve lift modeling was developed using GT-POWER software and the visualization the model using STAR-CD. The … …American Journal of Applied Sciences, Vol. 5, Issue 5 · 31 May 2008 · 6,939 accessesView PDFCite
Research ArticleOpen accessIn the abstractHow Greece and Ireland Have Been Positioned in the World Developments Since 1945: A French Regulation ApproachLavrentios VasiliadisThis research analyses how Greece and Ireland have been positioned in the world development since 1945 by using the French Regulation Approach. In particular, this analysis describes three broad periods, notably the Fordist, post-Fordist and the New Economy ones. In each period, apart from the general approach that concerns the world economy transformation, the specific transformations of the economies of … …Journal of Social Sciences, Vol. 4, Issue 1 · 31 Mar 2008 · 7,362 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Training on Skill Development of Agricultural Extension Workers in Bangladesh: A Case Study in Four Upazilas (Sub-district) Under Kishoreganj DistrictMohammad Jiaul Hoque, Koichi UsamiThis study was conducted to identify the contributing Off-the-Job Trainings (Off-JT) and determinant On-the-Job Training (OJT) for developing Agricultural Extension Workers' (AEWs) extension skills. Data on AEWs' skill levels on selected four extension skill areas (namely, working with group, organizing and running a demonstration, assessing farmers' problems, and work planning), attendance of Off-JT, and OJT practices were collected from 90 … …Journal of Social Sciences, Vol. 4, Issue 1 · 31 Mar 2008 · 7,581 accessesView PDFCite